DTV receiver and method of processing signal in DTV receiver

Abstract

A DTV receiver includes a tuner, a demodulator, a channel equalizer, a sequence detector, and a burst controller. The tuner receives a DTV signal having main data and at least one burst of enhanced data. The demodulator demodulates the DTV signal by performing carrier and time recovery and the channel equalizer equalizes the demodulated signal. The sequence detector detects one or more known data sequences from any one of the received signal and the demodulated signal. The demodulator and the channel equalizer use the detected known data sequences when performing the carrier and timing recover and the channel-equalization, respectively. Lastly, the burst controller supplies power to the tuner, the demodulator, the channel equalizer, and the data detector only during a burst time for each burst of enhanced data for efficient power consumption.

Description

[0001] This application claims the benefit of the Korean Patent Application No. 10-2005-0096300, filed on Oct. 12, 2005, which is hereby incorporated by reference as if fully set forth herein. This application also claims the benefit of U.S. Provisional Application No. 60 / 825,263, filed on Sep. 11, 2006, which is hereby incorporated by reference.BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates to a digital telecommunications system, and more particularly, to a DTV receiver and method of processing signal in DTV receiver [0004] 2. Discussion of the Related Art [0005] Since the second half of 1998, the United States of America has adopted an advanced television systems committee (ATSC) VSB (Vestigial Sideband) transmission method as the 1995 standard for digital broadcasting. Presently, the Republic of Korea is also providing broadcast programs by adopting the ATSC 8T-VSB transmission method as the standard for broadcasting. Accordingly...

AI Technical Summary

Benefits of technology

[0012] Another object of the present invention is to provide a digital broadcasting system and receiving that can insert known data in a specific area of the additional data and transmitting the data to a transmitter / receiver, thereby enhancing the receiving quality of the digital television system.

[0013] A further object of the present invention is to provide a digital broadcasting system and receiving method for time-division multiplexing and transmitting enhanced data including main data and known data.

Problems solved by technology

However, when used indoors, the intensity of the signals may decrease due to a blockage caused by the walls or disturbance caused by approaching or proximate mobile objects.

Accordingly, the quality of the received digital signals may be deteriorated due to a ghost effect and noise caused by reflected waves.

However, unlike the general video / audio data, when transmitting the additional data, the data that is to be transmitted should have a low error ratio.

Conversely, in case of the additional data (e.g., program execution file, stock information, etc.), an error even in a single bit may cause a serious problem.

Furthermore, in a poor channel environment, the receiving quality of the conventional ATSC VSB receiving system may be deteriorated.

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